- document
- Hilkhuysen, G.L.M. (author) book 1999
- document
- Hilkhuysen, G.L.M. (author), Louwen, E. (author), Maat, C. (author) book 1997
- document
- Hilkhuysen, G.L.M. (author), Louwen, E. (author), Maat, C. (author) book 1997
- document
- Kruythoff, H.M. (author), Cooien, H.C.C.H. (author), Hilkhuysen, G.L.M. (author) book 1997
- document
- Coolen, H. (author), Hilkhuysen, G. (author) book 1992
- document
- Teule, R. (author), Heeger, H. (author), Hilkhuysen, G. (author) book 1991